The Kyoto Protocol on climate change goes into effect this week. However, your view of that -- and other concepts in science and technology -- probably depends a good deal on where in the world you live.
Leon Lederman, director emeritus, Fermi National Accelerator Laboratory. Pritzker Professor of Science, Illinois Institute of Technology. Nobel Laureate, 1988, Physics
Melissa Pollak, senior analyst, National Science Foundation Nick Allum, lecturer, Department of Sociology, University of Surrey
Sharon Friedman, professor of journalism and communication. Director, science and environmental writing program, Lehigh University